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All Journal Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurna Beta Kimia
Harun, Rahmah
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Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Medicine & Pharmacology Social Sciences Other

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Comparison of Cellulose Extraction Methods from Lontar (Borassus flabellifer) and Salak (Salacca zalaacca) Fronds Rusdin, Aisyah; Harun, Rahmah; Yunita, Vivi Alfi; Awaluddin, Awaluddin
Jurnal Beta Kimia Vol 5 No 1 (2025): Volume 5 Number 1, May 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i1.21199

Abstract

Palmyra fronds and salak fronds are waste products from the palmyra and salak plants that have not been optimally utilized. However, the high cellulose content in these fronds offers potential applications across various fields. This study aimed to extract and compare cellulose from lontar (Borassus flabellifer) and salak (Salacca zalacca) frond waste using two methods: alkaline sodium hydroxide (NaOH) solvent and nitric acid (HNO₃) hydrolysis. After soaking and heating, the extraction was performed through a bleaching process. The yield results showed that lontar fronds produced the highest yield of 64.22% using the acid hydrolysis method, while salak fronds yielded 46.8%. The cellulose obtained from lontar fronds was gray, and from salak fronds, it was white, indicating differences in purity. After treatment, the disappearance of the carbonyl group (C=O) in the FTIR functional group analysis indicated successful delignification. Common cellulose functional groups such as O-H, C-H, and C-O, as well as β-1,4 glycosidic bands, were detected at wave numbers 895-897 cm⁻¹, indicating that the cellulose structure was well preserved. Cellulose from both lontar and salak fronds has great potential to serve as an environmentally friendly alternative raw material for applications in bioplastics, bioethanol, and other cellulose derivatives.
Integrated Forensic Training Program for Indonesian National Police Investigators in West Java Region Amri, Afdhal; Harun, Rahmah; Rahmad
Warta Pengabdian Andalas Vol 33 No 1 (2026)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.33.1.105-112.2026

Abstract

The increasing complexity of criminal cases in West Java necessitates a critical upgrade in the competency of Indonesian National Police (Polri) investigators regarding the application of Scientific Crime Investigation (SCI) principles. A significant gap has been identified in the integrated forensic evidence handling skills (digital, biological, and chemical) at the Sub-Regional Police Resort (Polres) level, potentially compromising the accountability of criminal proceedings. This training program aimed to enhance the capacity of 40 investigators from the Jabar region through a comprehensive, integrated forensic training course. The 5-day program (September 15-19, 2025) was conducted in collaboration with the National Police's Forensic Laboratory Center (Puslabfor Bareskrim Polri), utilizing a Pretest-Posttest design and a hands-on simulation methodology. Evaluation results demonstrated an average competency score increase of 48.57% (from 55.8 to 82.9), significantly exceeding the minimum target of 25%. The most drastic improvement was observed in the Digital Forensics module (79.57%). Practically, 92.5% of participants showed enhanced technical proficiency in applying the integrated Chain of Custody (CoC) protocol. The participant satisfaction level reached 94% (4.7 out of 5.0). This training proved highly effective in bridging the competency gap, strengthening science-based investigative administration, and supporting the establishment of an accountable criminal justice system. The adoption of technical guidelines and the implementation of a sustained program are recommended for follow-up.
Co-Authors Amri, Afdhal Awaluddin Awaluddin Rahmad Rusdin, Aisyah Yunita, Vivi Alfi